JP2018505538A5 - - Google Patents

Claims (26)

A rechargeable battery,
A cathode,
A lithium metal anode;
A liquid electrolyte containing a lithium imide salt having a fluorosulfonyl (FSO ₂ ) group,
The electrolyte, Ri organic solvent der having lithium imide salt concentration of at least 2 moles per organic solvent 1 liter
The cathode active material is LiCoO ₂ , Li (Ni _1/3 Mn _1/3 Co _1/3 ) O ₂ , Li (Ni _0.8 Co _0.15 Al _0.05 ) O ₂ , LiMn ₂ O ₄ , Li A rechargeable battery that is a layered or spinel oxide material selected from the group consisting of (Mn _1.5 Ni _0.5 ) ₂ O ₄ or these lithium rich variants . The lithium imide salt is either LiN _{(FSO2) 2,} containing LiN _{(FSO 2)} 2, a battery according to claim 1. The battery of claim 1, wherein the lithium imide salt consists essentially of LiN (FSO ₂ ) ₂ . The lithium imide salt is LiN (FSO ₂ ) ₂ , LiN (FSO ₂ ) (CF ₃ SO ₂ ), LiN (FSO ₂ ) (C ₂ F ₅ SO ₂ ), and any combination thereof, or the above The battery according to claim 1, comprising:   The battery according to any one of claims 1 to 4, wherein the electrolyte has a lithium salt concentration of between 2 and 10 moles per liter of the organic solvent. The electrolyte according to any one of claims 1 to 5 , wherein the organic solvent includes, as the organic solvent, cyclic carbonate selected from ethylene carbonate or propylene carbonate, derivatives thereof, and any combination and mixture thereof. Battery. The electrolyte as the organic solvent, tetrahydrofuran or tetrahydropyran, these derivatives, and cyclic ether selected from any combinations thereof and mixtures of any one of claims 1-5 Battery . The electrolyte as the organic solvent, dimethoxyethane, diethoxyethane, triglyme or tetraglyme, derivatives thereof, and a glyme selected from any combinations thereof, and mixtures, any of claims 1 to 5 one The battery according to item. The electrolyte as the organic solvent, diethyl ether or methyl ether, derivatives thereof, and an ether selected from any combination of these and mixtures battery according to any one of claims 1-5. The organic solvent is substantially composed of dimethoxyethane, battery according to any one of claims 1-5. The organic solvent is made substantially from dimethoxyethane, and the electrolyte comprises a lithium salt concentration of between the organic solvent per liter of 4 to 6 moles, the battery according to any one of claims 1 to 5 . The organic solvent is made substantially from dimethoxyethane, and the electrolyte comprises a lithium salt concentration of between the organic solvent per liter 3 to 7 moles, battery according to any one of claims 1 to 5 . The battery according to any one of claims 1 to 5 , wherein the organic solvent is substantially composed of ethylene carbonate. The organic solvent consists substantially of ethylene carbonate, and the electrolyte comprises a lithium salt concentration of between the organic solvent per liter 2 to 3 moles, the battery according to any one of claims 1 to 5 . The organic solvent consists substantially of ethylene carbonate, and the electrolyte comprises a lithium salt concentration of between the organic solvent per liter 2 to 4 moles, the battery according to any one of claims 1 to 5 . The battery according to any one of claims 1 to 15 , wherein the anode is a lithium metal foil pressed onto a current collector comprising copper foil or mesh. The anode is a bare current collector comprising a copper foil or mesh, lithium, subsequently, during said initial charging of the battery is exposed plated on a current collector, 15 of claim 1 The battery according to any one of the above. The anode comprises lithium foil thickness in the range from 0.1 to 100 microns, the battery according to any one of claims 1-16. The anode comprises lithium foil thickness in the range of from 5 to 50 microns, the battery according to any one of claims 1-16. The anode comprises lithium foil thickness in the range of from 10 to 30 microns, the battery according to any one of claims 1-16. The cathode and anode, to prevent electrical contact while permitting ionic conduction, are held apart by a porous separator immersed in a liquid electrolyte, the battery according to any one of claims 1 to 20. FIG. The battery is a coin, a pouch, a prism, having a form factor selected from the group consisting of a cylinder or a thin film, according to any one of claims 1 to 21 batteries. The organic solvent is selected lithium coulombic efficiency to increase to 95 percent, the battery according to any one of claims 1 to 22. An electrochemical cell,
Copper foil as working electrode;
A lithium metal foil as a counter electrode;
A liquid electrolyte containing a lithium imide salt,
The electrolyte is an organic solvent having a lithium salt concentration of at least 2 moles per liter of the organic solvent;
The lithium imide salt, the lithium imide salt concentration and the organic solvent are obtained by electroplating ³ mAh / cm ² of lithium on the copper foil and electrically stripping the lithium from the copper foil until the potential reaches + 0.5V. And the process is repeated at least 20 cycles at 0.7 rate and the Coulomb efficiency of lithium measured by determining the average of the stripping to plating capacity ratio is selected to increase to greater than 95%. Electrochemical cell. 25. The electrochemical cell according to claim 24 , wherein the lithium imide salt and the organic solvent are selected to increase the Coulomb efficiency of lithium to greater than 97%. 25. The electrochemical cell of claim 24 , wherein the lithium imide salt and the organic solvent are selected to increase the Coulomb efficiency of lithium to greater than 99%.